Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v2.4.0.8
Marketable Securities (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 30, 2014
Mar. 31, 2013
Mar. 30, 2014
Mar. 31, 2013
Sep. 29, 2013
Schedule of Marketable Securities [Line Items]          
Total marketable securities - Current $ 10,291   $ 10,291   $ 8,824
Total marketable securities - Noncurrent 15,425   15,425   14,440
Trading Securities [Abstract]          
Trading - Current 508   508   510
Trading - Noncurrent 410   410   409
Net gains (losses) recognized on debt securities classified as trading held at the end of the period 0 (15) 0 (16)  
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 9,783   9,783   8,314
Available-for-sale - Noncurrent 14,460   14,460   13,494
Fair Value Option [Abstract]          
Effective ownership interest in debt fund (fair value option) 20.00%   20.00%    
U.S. Treasury securities and government-related securities [Member]
         
Trading Securities [Abstract]          
Trading - Current 319   319   241
Trading - Noncurrent 13   13   49
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 945   945   721
Available-for-sale - Noncurrent 431   431   71
Corporate bonds and notes [Member]
         
Trading Securities [Abstract]          
Trading - Current 189   189   269
Trading - Noncurrent 263   263   256
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 5,737   5,737   4,533
Available-for-sale - Noncurrent 7,981   7,981   6,812
Mortgage- and asset-backed securities [Member]
         
Trading Securities [Abstract]          
Trading - Current 0   0   0
Trading - Noncurrent 134   134   104
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 896   896   745
Available-for-sale - Noncurrent 421   421   328
Auction rate securities [Member]
         
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 0   0   0
Available-for-sale - Noncurrent 83   83   83
Common and preferred stock [Member]
         
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 40   40   8
Available-for-sale - Noncurrent 2,398   2,398   2,351
Debt funds [Member]
         
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 2,165   2,165   2,307
Available-for-sale - Noncurrent 2,513   2,513   2,889
Fair Value Option [Abstract]          
Fair value option - Current 0   0   0
Fair value option - Noncurrent 555   555   537
Increase in fair value recognized in investment income 12 8 18 18  
Equity funds [Member]
         
Available-for-sale Securities [Abstract]          
Available-for-sale - Current 0   0   0
Available-for-sale - Noncurrent $ 633   $ 633   $ 960